import java.util.*;

/*
 * public class ListNode {
 *   int val;
 *   ListNode next = null;
 *   public ListNode(int val) {
 *     this.val = val;
 *   }
 * }
 */

public class code3 {
    /**
     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
     *
     *
     * @param head ListNode类 the head node
     * @return ListNode类
     */
    public ListNode sortInList (ListNode head) {
        // 转为数组版
        ArrayList<Integer> list = new ArrayList<>();
        ListNode cur = head;
        while(cur !=null) {
            list.add(cur.val);
            cur = cur.next;
        }

        Collections.sort(list);

        cur = head;
        for(int x:list) {
            cur.val = x;
            cur = cur.next;
        }

        return head;
    }
}
